AR022371A1 - METHOD AND APPLIANCE TO REDUCE THE VARIATIONS OF AMPLITUDE AND INTERFERENCE IN COMMUNICATION SIGNALS, SUCH AS IN WIRELESS COMMUNICATION SIGNALS USING INSERTED PILOT SYMBOLS - Google Patents

METHOD AND APPLIANCE TO REDUCE THE VARIATIONS OF AMPLITUDE AND INTERFERENCE IN COMMUNICATION SIGNALS, SUCH AS IN WIRELESS COMMUNICATION SIGNALS USING INSERTED PILOT SYMBOLS

Info

Publication number
AR022371A1
AR022371A1 ARP990104340A ARP990104340A AR022371A1 AR 022371 A1 AR022371 A1 AR 022371A1 AR P990104340 A ARP990104340 A AR P990104340A AR P990104340 A ARP990104340 A AR P990104340A AR 022371 A1 AR022371 A1 AR 022371A1
Authority
AR
Argentina
Prior art keywords
pilot symbols
implementation
communication signals
chip
wireless communication
Prior art date
Application number
ARP990104340A
Other languages
Spanish (es)
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of AR022371A1 publication Critical patent/AR022371A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/12—Generation of orthogonal codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/2615—Reduction thereof using coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70706—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with means for reducing the peak-to-average power ratio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Varios métodos y aparatos correspondientes reducen la potencia pico a promedio en senales transmitidas en un sistema de comunicaciones inalámbrico,particularmente con respecto a símbolos piloto transmitidos desde una estacion base a varias estacionesusuarias. Se ha encontrado que una gran amplitud picopromedio de símbolos piloto insertados resulta de una posicion de partícula (chip) comun que existe en los codigos ortogonales, tales como los codigos Walsh.En una primera implementacion los codigos Walsh son multiplicados por un valor aleatorio de +/- 1. En una segunda implementacion, la posicion de partícula(chip) de signo comun es eliminada en cada codigo Walsh. La estacion usuaria entonces inserta la posicion de partícula (chip) faltantepara recuperar laortogonalidad. En una tercera implementacion, la estacion base transmite símbolos piloto, en un canal piloto separado, solamente en las posiciones de símbolodonde las estaciones usuarias esperan encontrar símbolos piloto. En una cuarta implementacion, cada codigo Walsh es desplazado en forma aleatoria.Several corresponding methods and devices reduce the peak to average power in signals transmitted in a wireless communication system, particularly with respect to pilot symbols transmitted from a base station to several user stations. It has been found that a large peak average amplitude of inserted pilot symbols results from a common particle position (chip) that exists in orthogonal codes, such as Walsh codes. In a first implementation Walsh codes are multiplied by a random value of + / - 1. In a second implementation, the common sign particle (chip) position is eliminated in each Walsh code. The user station then inserts the missing particle position (chip) to recover the originality. In a third implementation, the base station transmits pilot symbols, in a separate pilot channel, only at the symbol positions where the user stations expect to find pilot symbols. In a fourth implementation, each Walsh code is randomly shifted.

ARP990104340A 1998-08-31 1999-08-30 METHOD AND APPLIANCE TO REDUCE THE VARIATIONS OF AMPLITUDE AND INTERFERENCE IN COMMUNICATION SIGNALS, SUCH AS IN WIRELESS COMMUNICATION SIGNALS USING INSERTED PILOT SYMBOLS AR022371A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/144,402 US6310869B1 (en) 1998-08-31 1998-08-31 Method and apparatus for reducing amplitude variations and interference in communication signals, such as in wireless communication signals employing inserted pilot symbols

Publications (1)

Publication Number Publication Date
AR022371A1 true AR022371A1 (en) 2002-09-04

Family

ID=22508421

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP990104340A AR022371A1 (en) 1998-08-31 1999-08-30 METHOD AND APPLIANCE TO REDUCE THE VARIATIONS OF AMPLITUDE AND INTERFERENCE IN COMMUNICATION SIGNALS, SUCH AS IN WIRELESS COMMUNICATION SIGNALS USING INSERTED PILOT SYMBOLS

Country Status (12)

Country Link
US (2) US6310869B1 (en)
EP (2) EP1110360B1 (en)
JP (1) JP4191388B2 (en)
KR (1) KR100697510B1 (en)
CN (1) CN1186888C (en)
AR (1) AR022371A1 (en)
AT (2) ATE400956T1 (en)
AU (1) AU5589299A (en)
DE (2) DE69939078D1 (en)
ES (1) ES2251221T3 (en)
HK (1) HK1040014B (en)
WO (1) WO2000013337A2 (en)

Families Citing this family (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6603751B1 (en) * 1998-02-13 2003-08-05 Qualcomm Incorporated Method and system for performing a handoff in a wireless communication system, such as a hard handoff
US20030194033A1 (en) 1998-05-21 2003-10-16 Tiedemann Edward G. Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system
EP1101294B1 (en) * 1998-07-28 2010-12-15 Samsung Electronics Co., Ltd. Gated transmission in control hold state in cdma communication system
US6396817B2 (en) * 1998-08-31 2002-05-28 Qualcomm Incorporated Signal splitting method for limiting peak power in a CDMA system
WO2000036761A2 (en) 1998-12-14 2000-06-22 Interdigital Technology Corporation Random access channel preamble detection
US6721349B1 (en) * 1999-01-28 2004-04-13 Qualcomm Incorporated Method and apparatus for reducing peak-to-average ratio in a CDMA communication system
US6587446B2 (en) 1999-02-11 2003-07-01 Qualcomm Incorporated Handoff in a wireless communication system
US6549564B1 (en) * 1999-04-08 2003-04-15 Telefonaktiebolaget Lm Ericsson (Publ) Random access in a mobile telecommunications system
US6674810B1 (en) * 1999-05-27 2004-01-06 3Com Corporation Method and apparatus for reducing peak-to-average power ratio in a discrete multi-tone signal
US6961369B1 (en) 1999-11-09 2005-11-01 Aware, Inc. System and method for scrambling the phase of the carriers in a multicarrier communications system
DE60102117T2 (en) * 2000-08-02 2004-09-09 Lucent Technologies Inc. Method of reducing the peak to medium power ratio in a wireless communication system
US20020118783A1 (en) * 2001-02-26 2002-08-29 Peter Cripps Smart antenna based spectrum multiplexing using a pilot signal
US6836666B2 (en) * 2001-05-08 2004-12-28 Lucent Technologies Inc. Method to control uplink transmissions in a wireless communication system
US8249187B2 (en) 2002-05-09 2012-08-21 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
ATE421807T1 (en) * 2001-05-31 2009-02-15 Magnolia Broadband Inc COMMUNICATION DEVICE WITH INTELLIGENT ANTENNA USING A QUALITY INDICATOR SIGNAL
US7190749B2 (en) * 2001-06-06 2007-03-13 Qualcomm Incorporated Method and apparatus for canceling pilot interference in a wireless communication system
US7106784B2 (en) * 2002-01-25 2006-09-12 Sasken Communication Technologies Limited Universal rake receiver
US7292552B2 (en) * 2002-03-14 2007-11-06 Qualcomm Incorporated Method and apparatus for reducing interference in a wireless communication system
US7266156B2 (en) 2002-04-26 2007-09-04 Qualcomm Incorporated Method and apparatus for reducing peak to average power ratio of a multi-carrier signal
KR100452512B1 (en) * 2002-08-16 2004-10-13 엘지전자 주식회사 A spreading device and a method of walsh code for improving channel capacity
KR100475180B1 (en) * 2002-10-24 2005-03-10 엘지전자 주식회사 Diminish appatatus for Peak to Average Ratio in multi-carrier transmitter
US6996763B2 (en) * 2003-01-10 2006-02-07 Qualcomm Incorporated Operation of a forward link acknowledgement channel for the reverse link data
US8023950B2 (en) 2003-02-18 2011-09-20 Qualcomm Incorporated Systems and methods for using selectable frame durations in a wireless communication system
US8081598B2 (en) * 2003-02-18 2011-12-20 Qualcomm Incorporated Outer-loop power control for wireless communication systems
US7660282B2 (en) * 2003-02-18 2010-02-09 Qualcomm Incorporated Congestion control in a wireless data network
US8150407B2 (en) * 2003-02-18 2012-04-03 Qualcomm Incorporated System and method for scheduling transmissions in a wireless communication system
US7155236B2 (en) 2003-02-18 2006-12-26 Qualcomm Incorporated Scheduled and autonomous transmission and acknowledgement
US7418064B2 (en) * 2003-02-18 2008-08-26 Qualcomm, Incorporated Systems and methods for hierarchically demodulating and decoding a data signal using a pilot signal and an additional signal
US8391249B2 (en) 2003-02-18 2013-03-05 Qualcomm Incorporated Code division multiplexing commands on a code division multiplexed channel
US20040160922A1 (en) * 2003-02-18 2004-08-19 Sanjiv Nanda Method and apparatus for controlling data rate of a reverse link in a communication system
US7215930B2 (en) * 2003-03-06 2007-05-08 Qualcomm, Incorporated Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication
US8705588B2 (en) 2003-03-06 2014-04-22 Qualcomm Incorporated Systems and methods for using code space in spread-spectrum communications
US8477592B2 (en) * 2003-05-14 2013-07-02 Qualcomm Incorporated Interference and noise estimation in an OFDM system
KR20050012478A (en) * 2003-07-25 2005-02-02 유티스타콤코리아 유한회사 Control method of papr for using walsh code allocation in cdma-2000 system
US8489949B2 (en) 2003-08-05 2013-07-16 Qualcomm Incorporated Combining grant, acknowledgement, and rate control commands
CN1833390B (en) * 2003-08-07 2012-01-18 松下电器产业株式会社 Radio transmitting apparatus and radio transmitting method
DE10337828A1 (en) * 2003-08-18 2005-04-21 Siemens Ag Method for selecting a transmission channel
US20050141410A1 (en) * 2003-10-30 2005-06-30 1021 Technologies Inc. Method of reducing peak-to-average ratio in multi-carrier communications systems
US7551637B2 (en) * 2004-01-23 2009-06-23 Qualcomm Incorporated Method and apparatus for channel sensitive scheduling in a communication system
US7272359B2 (en) * 2004-01-26 2007-09-18 Magnolia Broadband Inc. Communicating signals according to a quality indicator using multiple antenna elements
US9094144B2 (en) * 2004-04-29 2015-07-28 Alcatel Lucent Methods and apparatus for code division multiple access communication using code book that provides reduced peak-to-average power ratio
JP5015785B2 (en) * 2004-11-10 2012-08-29 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Method and apparatus for reducing peak power in a code multiplexed downlink control channel
JP4546342B2 (en) 2005-07-07 2010-09-15 パナソニック株式会社 Transmitting apparatus and transmitting method
US7917798B2 (en) 2005-10-04 2011-03-29 Hypres, Inc. Superconducting digital phase rotator
JP4771835B2 (en) * 2006-03-06 2011-09-14 株式会社リコー Toner and image forming method
US7991040B2 (en) 2006-04-04 2011-08-02 Qualcomm Incorporated Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal
GB0623481D0 (en) * 2006-11-24 2007-01-03 Imp Innovations Ltd Improved methods and apparatus for transmitting and receiving data
KR101422014B1 (en) * 2007-05-10 2014-07-23 엘지전자 주식회사 Method For Generating Long Code By Repeating Basic Code, And Method For Transmitting Control Information Using The Same
US8477830B2 (en) 2008-03-18 2013-07-02 On-Ramp Wireless, Inc. Light monitoring system using a random phase multiple access system
US7593452B1 (en) * 2008-03-18 2009-09-22 On-Ramp Wireless, Inc. Despreading spread spectrum data
US8958460B2 (en) * 2008-03-18 2015-02-17 On-Ramp Wireless, Inc. Forward error correction media access control system
US20090239550A1 (en) * 2008-03-18 2009-09-24 Myers Theodore J Random phase multiple access system with location tracking
US7773664B2 (en) * 2008-03-18 2010-08-10 On-Ramp Wireless, Inc. Random phase multiple access system with meshing
US8520721B2 (en) 2008-03-18 2013-08-27 On-Ramp Wireless, Inc. RSSI measurement mechanism in the presence of pulsed jammers
US7733945B2 (en) * 2008-03-18 2010-06-08 On-Ramp Wireless, Inc. Spread spectrum with doppler optimization
US20100195553A1 (en) * 2008-03-18 2010-08-05 Myers Theodore J Controlling power in a spread spectrum system
US8644407B2 (en) * 2008-06-23 2014-02-04 Blackberry Limited Apparatus, and associated method of phase-offset modulation, for space-time coded wireless communication systems
US8964692B2 (en) * 2008-11-10 2015-02-24 Qualcomm Incorporated Spectrum sensing of bluetooth using a sequence of energy detection measurements
WO2010073339A1 (en) * 2008-12-25 2010-07-01 富士通株式会社 Signal generation device, transmission device, signal generation method, transmission method, and communication system
WO2010101497A1 (en) * 2009-03-03 2010-09-10 Telefonaktiebolaget L M Ericsson (Publ) Base station and method for scheduler controlled setting of the output power of a base station power amplifier
US8363699B2 (en) 2009-03-20 2013-01-29 On-Ramp Wireless, Inc. Random timing offset determination
KR20140075252A (en) * 2012-12-11 2014-06-19 한국전자통신연구원 Apparatus and method for control channel configuration and detection of control information
US9664767B2 (en) * 2013-05-17 2017-05-30 Massachusetts Institute Of Technology Time-resolved magnetic sensing with electronic spins in diamond
KR101403221B1 (en) * 2013-06-05 2014-06-02 이화여자대학교 산학협력단 System and method for measuring utility usage using ring communication architecture and ortho code in smart grid environment
US9621197B2 (en) * 2015-03-10 2017-04-11 Samsung Electronics Co., Ltd. Bi-phased on-off keying (OOK) transmitter and communication method

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4901307A (en) 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5109390A (en) 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5056109A (en) 1989-11-07 1991-10-08 Qualcomm, Inc. Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system
US5101501A (en) 1989-11-07 1992-03-31 Qualcomm Incorporated Method and system for providing a soft handoff in communications in a cdma cellular telephone system
US5103459B1 (en) 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US5497395A (en) * 1994-04-04 1996-03-05 Qualcomm Incorporated Method and apparatus for modulating signal waveforms in a CDMA communication system
JP3126904B2 (en) 1994-07-21 2001-01-22 キヤノン株式会社 Spread spectrum communication equipment
US5602833A (en) 1994-12-19 1997-02-11 Qualcomm Incorporated Method and apparatus for using Walsh shift keying in a spread spectrum communication system
EP0758168B2 (en) * 1995-02-23 2010-07-07 NTT DoCoMo, Inc. Variable rate transmitting method, and transmitter and receiver using it
US5793797A (en) 1995-05-09 1998-08-11 Unisys Corporation Data transmisson system with a low peak-to-average power ratio based on distorting small amplitude signals
US5742595A (en) 1995-06-02 1998-04-21 Dsc Communications Corporation Processing CDMA signals
KR20000052644A (en) 1996-10-18 2000-08-25 클라스 노린, 쿨트 헬스트룀 Transmission timing offset method for ds-cdma mobile telephone systems
JPH10190626A (en) 1996-12-27 1998-07-21 Matsushita Electric Ind Co Ltd Cdma reception device

Also Published As

Publication number Publication date
EP1110360A2 (en) 2001-06-27
JP4191388B2 (en) 2008-12-03
EP1613013A1 (en) 2006-01-04
HK1040014B (en) 2005-08-05
ES2251221T3 (en) 2006-04-16
ATE400956T1 (en) 2008-07-15
CN1325583A (en) 2001-12-05
ATE309662T1 (en) 2005-11-15
CN1186888C (en) 2005-01-26
KR100697510B1 (en) 2007-03-20
KR20010074910A (en) 2001-08-09
EP1613013B1 (en) 2008-07-09
AU5589299A (en) 2000-03-21
JP2002524911A (en) 2002-08-06
WO2000013337A3 (en) 2000-06-08
EP1110360B1 (en) 2005-11-09
DE69928269D1 (en) 2005-12-15
HK1040014A1 (en) 2002-05-17
US20020021683A1 (en) 2002-02-21
US6310869B1 (en) 2001-10-30
DE69939078D1 (en) 2008-08-21
DE69928269T2 (en) 2006-07-13
WO2000013337A2 (en) 2000-03-09

Similar Documents

Publication Publication Date Title
AR022371A1 (en) METHOD AND APPLIANCE TO REDUCE THE VARIATIONS OF AMPLITUDE AND INTERFERENCE IN COMMUNICATION SIGNALS, SUCH AS IN WIRELESS COMMUNICATION SIGNALS USING INSERTED PILOT SYMBOLS
ES2937858T3 (en) Apparatus for configuring DM-RS for V2X
AR056596A1 (en) SELECTIVE ELIMINATION CHANNEL FOR A WIRELESS COMMUNICATION SYSTEM
BR112019002676A2 (en) rach conversion of dl sync beam information to multiple dl-ul match states
PH12018501516A1 (en) User terminal, radio base station, and radio communication method
AR025824A1 (en) A METHOD FOR CORRELIZING A SIGNAL RECEIVED IN A FIRST TRANSCEIVER AND TRANSMITTING A SECOND TRANSCEIVER, A SEQUENCE GENERATOR
CL2019001165A1 (en) Method of configuring the uplink send waveform, base station and user equipment.
PH12018500455A1 (en) Methods providing ul grants including time domain configuration and related wireless terminals and network nodes
ES2908752T3 (en) Method for determining the start time of a physical downlink control channel
BR112019007837A2 (en) Uplink transmission techniques in low latency wireless communication systems
BR0211433A (en) method of using reverse or near orthogonal reverse link codes and wireless communication system
BR112013006930A2 (en) Cell information acquisition to improve network operation in heterogeneous environment
EP2981015B1 (en) System frame number information transmission method, base station, terminal and system
ES2846073T3 (en) Method and apparatus for configuring DM-RS for V2X
BRPI0407628A (en) controlled overlay coding in multi-user communication systems
AR051852A1 (en) METHOD AND APPLIANCE TO COMMUNICATE PROGRAMMING INFORMATION FROM A US TO A RADIO ACCESS NETWORK
PT1351421E (en) Apparatus and method for generating scrambling code in umts mobile communication system
CL2012001997A1 (en) A user equipment, radio base station, and operating methods for the transmission of uplink control information comprised in a block of bits through a channel to the radio base station.
BR112018009671A2 (en) physical layer signaling for different eu groups on different physical resources
BR0008496A (en) Method and system for reducing synchronization time in a cdma wireless communication system
BR112012025072A2 (en) wireless transmission scheduling system and method
AR054362A1 (en) EFFICIENT SUPPORT FOR TRAINING OF TDD DOES THROUGH RESTRICTED JUMPS AND PILOT ON REQUEST
ES2204357T1 (en) SUB-CHANNELS FOR RANDOM ACCESS CHANNEL IN DUPLEX TIME DIVISION SYSTEMS.
AR084227A1 (en) ACTIVATION AND DEACTIVATION OF THE PROTECTION OF THE INTEGRITY OF RADIO DATA CARRIER
CA2361083A1 (en) Mobile communication system in multi-carrier cdma scheme using short code and long code